Magnetically-controlled velocity selection in a cold atom sample using stimulated Raman transitions

TL;DR

This paper demonstrates a method for velocity selection in cold atoms using stimulated Raman transitions, enabling a simple, high-resolution magnetometer that requires no extra lasers beyond standard cooling setups.

Contribution

It introduces a novel velocity selection technique leveraging stimulated Raman transitions for magnetic field measurement in cold atom experiments.

Findings

Achieved sub-mG magnetic field resolution.

Demonstrated velocity selection in cold atoms.

Verified results with Faraday rotation spectroscopy.

Abstract

We observe velocity-selective two-photon resonances in a cold atom cloud in the presence of a magnetic field. We use these resonances to demonstrate a simple magnetometer with sub-mG resolution. The technique is particularly useful for zeroing the magnetic field and does not require any additional laser frequencies than are already used for standard magneto-optical traps. We verify the effects using Faraday rotation spectroscopy.